Pressure-gage



T. .W. ANDERSON.

PRESSURE GAGE. APPLICATION FILED JUNE 14, 1915- a H J W E 6 I s w g A Kii i J INVENTOR ,1) A/[ E .2 I B Ailorney WITNESSES:

THOMAS "W. ANDERSON", OFCAJVIDEN FOIIWI', MISSDURI, ASSIGNOR TO A.SGHEMllll-lthl SON, INCURIPORATED. 0F BROOKLYN, YORK, A CORPORA'IION 0NEW new PRESSURE- Gil-EH.

naeaeaa Specification of Letters Patent.

Patented Dec 2th iillfiilli application filed June 14, 19155. Serial No.33,867.

To all ZUILOWLit may concern:

Be it known that I, TrIoMAs W. ANDER- SON, a citizen of the UnitedStates of America, residing in Camden Point, in the county of Platte andState of Missouri, have invented certain new and useful lmprovements inPressure-Gages, of which the following is a specification.

This invention relates to pressure gages, and aims to provide certainimprovements therein.

The construction is adapted to be used in connection with a tire valve,or separately therefrom, as may be desired.

Referring to the drawings whichillus trate several embodiments of theinvention,

Figure 1 is a side elevation of a combined gage and valve.

Fig. 2 is an enlarged diametrical section thereof. I

Fig. 3 is across-section on the line 3-43 in Fig. 2.

4 is a crosssection on the line d l in Fig. 2.

5 is a diametrical section of the device employed as a and adapted forapplication to a tire valve.

Referring first to Figs. 1 to 4:, let A 1ndicate a suitable shell whichin these fig nres is illustrated as a tire valve shell or casing. At thetop-of the shell is provided an inlet or check valve B of well-knownconstruction, and which, therefore, need not be particularly described.The shell is formed with a passage C which passes through the flangedfoot of the valve shell whereby to establish communication with the tubeE. The passage for the inlet and outlet oi air is by this means isolatedfrom the gage structure. I

The gage structure is contained principally in an enlarged bore F formedin the shell or casing. At theiioot oftheshell and arranged partlywithin the bore 15 prefer ably provided a thimble or diaphragm G whichis preferably made of elastic rubber and is fastened to the shellaroundthe flange nipple l-l formed at the foot of the latter, the diahragm being clamped to the flange nipple by a ring l or in any othersuitable manner. Any other suitable pressure responsive means may beemployed. Above the top of the diaphragm is arranged a plate J which ispressed downwardly by a spr ng K surrounding a rod L which is connectedcatory movement of the plate J is translated into a rotary movement ofthe indicator, let tered M, which is shown as arranged at the top of thebore F. In the construction shown the rod l1 has fixed to it a rack Nwhich meshes with a pinion 0 carried upon a shaft P, which shaft alsocarries a beveled gear Q. meshing with a smaller bevel ll fixed atthelower end of the rod 5% which carries the indicator M. i

The effect or this construction is that as the pressure increases theindicator member M is turned to expose the indications (shown in pounds)through a slot or win (low T "formed in the casing. In order to avoidoverlapping of the indications the window T is preferably more or lessvertisally arranged, being shown as slightly inclined. to the vertical.v

The gear device is preferably located within a casing U, the upper partof which has a bearing for the shaft 5%, and the lower part a bearingfor the rod L. Between the two the shaft l? is mounted. The casing; t

may be fixed within the bore F by pins V V'.

For purposes of convenience the lower wall of the casing U is formed asa head 'W which screws into the body of the casing Upon removal of thepins V V and the ring" I, the entire device may he slid out of thecasing.

One of the advantages of theinvention is that the gearing may be soproportioned as to producerelatively large movements of the indicator Mupon relatively smaller movements of the plate J. ln the construc tionshown the movements of the plate are greatly amplified so that a largesurface of the indicator may be employed for indicat ing purposes. Theparts may be so proportioned that several rotations maybe given. to theindicator if desired during a complete movement of the plate J from zeroto the maximum pressure whichthe gage is adapted to indicate.

In Fig. 5 l have illustrated the construe tion as applied to a gage perac. In this construction the valve is omitted, and the parts arecontained within a casing A. The foot of the casing is provided with anahut merit B which is adapted to contact with the stem C. of a tirevalve. The diaphragm or th'imble G is in this case formed with a flangewhich is clamped provided for making a tight joint with the a top of thevalve, While I have shown and described certain embodiments of theinvention, it will be understood that I do not wish to be limitedthereto, since various changes can be made therein Without-departingfrom the invention. i

What I claim is 1- 1. in a pressure gage, the combination of a rotarycylindrical drum-like indicating member, a longitudinally ieciprocatingpressure responsive member, said indicating member having its axis ofmovement in the line of movement of said pressure responsive membeigaconnection between the two for tr-ansiating themovements oftherecipmcating member into-rotary movements of the.

indicating member, and a cylindrical casing Hl'WillCil said parts arelocated 111 allnement one beyond another, said casing having asnbstantiaily straight bore of even diameter thirongiiont,

21- in a pressure gage, the combination of so a iongitndinallyreciprocable pressure-responsive member, a rack moved by said member, apinion meshing with said rack, a pair of beveled gears moved by saidpinion, and a rotary cylindrical indicating member moved by one of saidbeveled gears.

3. In a device of the character described, a shell having atire-engaging flange, and

a flange nipple at its foot, said flange nipple being other than saidtire-engaging flange, an elastic member having a part surrounding saidflange'nipple and clamped thereto, and gage mechanism operated by themove,- ments ofsaid elastic member;

4. In a pressure gage, the combination 0i a tubular casing,pressure-responsive means,

indicating means actuated thereby, said two means being adapted tofunction in said casing transmission mechanism between saidpressure-responsive means and said indicating'means, "and a support forsaid transmitting means,comprising a. tubular sleeve adapted to beinserted in said tflblb lar casing: v

In witness whereof, I haver hereunto signed my name in the presence oftwo subscribingwitnesses. r

. THOMAS W, ANDERSON.

Witnesses W. P. WOODSON,

A. L. PERnm.

